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Scholars Day 2006, Wednesday, April 12

Impact of Clarendon-Lyndon Fault and Road Deicing Salts on Groundwater Chemistry in Northwestern Monroe County, New York

A synoptic study of domestic well water supplies in northwestern Monroe County, NY reveals the range of major ion groundwater chemistries within the lakeshore region and seasonal water-chemistry variations. Unconsolidated glacial till and outwash deposits form the shallow aquifer (< 20m) that supplies domestic supply wells in this study. These surficial deposits overlie Queenston Shale bedrock of the Upper Ordovician. Twelve sampling wells within the region were monitored at 2 month intervals for depth to water, total dissolved solids and major ion composition. Spatial water chemistry trends within the region appear to be the result of upwelling associated with local fracture zones influenced by the regional Clarendon-Lyndon fault. Results illustrate the inherent spatial and temporal variability of groundwater chemistry in surficial aquifers due to upwelling of groundwater at depth and displays the residence time of road deicing salts in groundwater supplies within highly transmissive glaciolacustrine surficial aquifers.

Presenter: Ryan Grimm (Undergraduate Student)
Topic: Geology
Location: 106A Edwards
Time: 9 am (Session I)